There's a third (and possibly many more) variation(s). People don't like positivity because it often triggers a prejudgement of naivety, which in turn leads to defeatism (since you can't connect with someone; you feel disconnected from them due to their positivity and your inability to empathise with their perspective).

That's a trickier one to overcome with pure hubris, and imo a much more common one than some may think.